No delete entry in XML log - bug?

No delete entry in XML log - bug?

I'm using WinSCP 5.1.4 on Windows Server 2003 SBS to synchronize my website to my server in order to have a backup.
As it might be that multiple people work on the webspace I'd like to preserve a log of what has changed.

I'm using WinSCP with scripting, the script is as follows:

open mysession@mydomain.com
synchronize -delete -criteria=either -transfer=binary local "C:\www.mydomain.com" "/websites/www.mydomain.com"
close